<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>盒子的边框设置</title>
		<style>
			div {
				width: 300px;
				height: 300px;
				/* border-width: 20px; */
				/* solid是实线的意思 */
				/* border-style: solid; */
				/* dashed是虚线的意思 */
				/* border-style: dashed; */
				/* dotted是点线的意思 */
				/* border-style: dotted; */
				/* border-color: red; */
				/* border的复合写法 */
				/* border: 5px solid red; */
				/* border-top: 5px solid red; */
				/* border-bottom: 5px solid red; */
				/* border-left: 5px solid red; */
				border:  5px rgb(168, 160, 160);
				border-style:ridge;
			}
		</style>
	</head>
	<body>
		<div></div>
	</body>
</html>